//C04:4.6:printout.c --转换说明符.
#include <stdio.h>
#define PI 3.141593
int main(void)
{
    int number = 5;
    float expresso = 13.5;
    int cost = 3100;
    printf("The %d CEOs drank %f cups of expresso.\n", 
        number, expresso);
    printf("The value of pi is %f.\n", PI);
    printf("Farewell! thou art too dear for my possessing,\n");    
    printf("%c%d\n", '$', 2 * cost);
}